The TK M4 is KJW's first foray into the world of Gas Blow Back Rifles (GBBR). It is a design by Mr. Tanio Koba that has implemented some very interesting elements.
The KJW M4 is criticized by some for lacking realism in the bolt carrier group. However, after stress testing it has been found that the KJW M4 is more reliable then a WE or WA GBBR. This has made newcomers to GBBRs flock to it for rel...